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Researchers develop tiny micro supercapacitor ideal for wearable devices

Park Sae-jin Reporter(swatchsjp@ajunews.com) | Posted : March 10, 2020, 14:24 | Updated : March 10, 2020, 14:24
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[Courtesy of UNIST]

SEOUL -- South Korean researchers have developed a tiny chip-shaped energy storage system known as micro supercapacitor that is smaller than a grain of rice and can be attached to chips as well as wearables and internet of things (IoT) devices.

The Ulsan National Institute of Science and Technology (UNIST) said in a statement on Tuesday that its research team led by professor Lee Sang-young has developed a micro supercapacitor (MSC).

A supercapacitor, also known as an ultracapacitor, is a high-capacity capacitor that can store much more energy than normal capacitors. It is positioned between electrolytic capacitors and rechargeable batteries. Supercapacitors have a longer lifespan than those of lithium batteries. However, it is hard to attach MSCs onto other parts because of heat and chemicals.

 

[Courtesy of UNIST]

Lee's team used electrohydrodynamic jet-printing, a high-resolution printing method that controls printed liquid with an electric field, and succeeded in connecting 36 MSCs to an 8mm x 8mm chip.

"Electrohyrdodynamic jet-printing is a technology that can control cell performance freely without space constraints by placing batteries in high-density on a narrow board like IC chips," Lee said, adding that the special jet-printing method can be used on other electric devices.

Lee's research paper was published via the March 6 issue of the scientific journal Science Advances.

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